Is there any client example which can handle DataPart?

I'm disappointed with the limitation of process long data with MCP and found A2A define DataPart as base concept.

Is there any client example which can handle DataPart?

For example, client may get time series A from server A and and time series B from server B and user want to calculate the correlation between them.

I think the client must have following abilities to handle DataPart:

1. Summarize incoming DataPart and can see any part of it
2. Know the schema of DataPart
3. Can send incoming data to new task